Concept:Hay is best prepared when pasture crops have high nutrient value and tender stems.
Explanation:The cutting time of pasture crops determines the quality of hay.
Very young crops give low yield.
Mature crops lose digestibility and become fibrous.
Just before flowering, the plants are leafy and rich in proteins.
After seed maturation or drying up, the feeding quality is too poor.
So, the best stage for preparing hay is just before flowering.
Answer:B. just before flowering